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- Feb 1, 2015
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- 9,622
Without seeing your mechanical setup,it's hard to say but hall effect sensors are fairly sensitive. Some of the rare earth magnets are quite strong. A 1/4" diameter magnet embedded in a pulley should be sufficient to trigger the sensor. You will want mount the sensor as close as possible to the magnet path for greatest sensitivity. Depending upon your design, you may be able mount a plate under your pulley stack to accommodate the magnet. You can find rectangular rare earth magnets on eBay as thin as 2mm.